Grinding apparatus



March 4, 1930. R. J. EMMERT GRINDING APPARATUS Filed Sept. 14, 1925 4 Sheets-Sheet 1 n m W m 4 Sheets-Sheet 2 I I... .I M I .fllll mH IIIIIIIWWJIIIIIIIIIIIIIIIHI I X L F L H IHI IIIIIIIIIIII II mhnuuu n R. J. EMMERT GRINDING APPARATUS Filed Sept. 14, 1925 March 4, 1930.

March 4; 1930.

R'. J. EMMERT ant-mam; APPARATUS Filed Sept. 14, 1925 4 Sheets-Sheet 5 March 4, 1930. R. EMMERT 1,749,329

GRINDING APPARATUS Filed Sept. 14, 1925 4 Sheets-Sheet 4 ri ataken nthep l i machines.

Patented Mar. 4, 1930. v

ff; 'sTAT Es zoDeER J. EMMERTQoN 'ANDE soN, INDIANA, .ASSIGNOR, DY MESNE ASSIGNMENTS,

. To DELCO -BEMY conroItATIo or DAYTON, 01110, A CORPORATION or DELAWARE PATENT OFFICE GRINDING APPARATUS ilA'ppli cation filed September 14, 1925. Serial No. 56,188.

invention relates to apparatus for grind ng cylindrical bodies and more. particularly the field frames} of fdynamo-electric It has tea the practice, in inaking field frames for small generators andmotors, to forma blank of flat sheet metal into a cylin l drical form and weld the seam-so as to form be removed in order that the exterior surface" of the cylindrical frame will have a neat ap- .Iw ith respect to thegrinding wheel. Means a continuous tubular body. r There is generally an excess amount of welding material I I which, on cooling,"adheres to the cylindrical surface at the seam; and this. material must Pe n I One of the objects of the present invention isto provide a machine which will'r'apidly remove the excess weldi'ngmaterial at the seam ofthe cylindrical tube in ordergto' reduce materially the cost of manufactureof cylindrical tubes. In order to carry outthis*object,,the

invention comprise'sa conveyor for moving endwise a cylindrical tube between thesuitably-formed grinding'wheeliand the guiding surfaces which locate the cylinder correctly are provided for resurfacing the grinding 3 wheel periphery in case it wears away in ,an

. irregular manner; and. the entire conveying relative to the wheel, sothat as the wheel is mechanism and guiding device are adjustable worn down toward its axis, adjustments may I bem'ade so that the 'operationof the grinding wheel'upon the the same. 7

cylinder remains practically 3 Further obj ectsand advantages ofthepresent invention will "be apparent from the I following description, reference being had to the accompanying drawings, wherein a pre- "vention is clearlyshown.

'ferred form of embodiment of the presentin- In. the drawings:

ent invention;-

Fig: 3 is an end view on the same scaleas numeral will be removed.

, Fig. 4 is a sectional View on the line H of Fig. 5, andFig. 5-is an end view in the direction of the arrow5 in Fig. 1, of the grind.- ing wheel dressing device. I

Referringtothe drawings, 20 designates a base having a post 21 carrying a hinge pin 22 for pivotally supporting a conveyor frame '23 which is channel-shaped in cross-section,

and is provided with side flanges 24 and 25 connected by aweb portion26 including a U-shaped portion 27, which provides a groove 28 for receiving a conveyor chain 29. The chain 29 is brought around sprocket wheels .30 and 31 whichare carried by shafts 32 and 33, respectively, which are supported respecwork pieces 35. Theconveyor chain 29 is operated to moye the work pieces 35 toward the left of Fig. 1, and under an abrasive wheel 40 which is provided with'a grooved periphery 41 having a cross-sectional contour which conforms to the curvature of the exterior of the work piece 35. As the work pieces 35 pass underjthe grinding wheel 40, the excess welding material at the seam, indicated by While the work 35 is being operated upon by the wheel, it is guided'not only by the inclined guides 36 and 37, but also by a group of rollers 42 and 'a' group of rollers 43, located respectlvely at the left-hand side and at the right-hand A side of the work 35, as viewed in Fig. 2. Each 1 g r of the rollers 42 is rotatable around a spindle i Fig. 11is a s1de"elevation,.-partly in section, -5 ofagrinding machineembodyingthe"pres+ Fig. 2is'. a fragmentary view. on alarger scale than Fig. ;1, looking" in the direction of,

the arrow 2 inFig. 1;; I

veyorgframe 38. Each of the blocks 45 is Z bers onthe frameadjacent the wheel and on each side of the conveyor so that said conveyor is movable therebetween for maintaining the work piecesinproper alignment with the wheel, certain of said guide members be ing rigidly secured to the frame, others being 'yieldingly supported vthereon. J I 3. Grinding apparatus comprising, in coma 1 'bination, a non-adjustable, rotary abrasive wheel; a frame provided with a conveyor for delivering work pieces to said wheel means including inclinedguides and yieldable roll- ,p "proper alignment with the wheel; abase to ers supported by the frame on eachside of the conveyor so that the a conveyor moves there- 'between for maintaining the work pieces "in a awhich one end of the frame is pivotally secured; and adjustable means carried by the base,for supprorting the'other end of the J guides andyieldableroll'ers may be adjusted 7 relative to the wheel. i

Grinding apparatus comprising, in'combination, a base; a rotary,.abrasive wheelnonframe, and by means of'which the conveyor,

.adjustably supported on said base; a frame "supported on the base; oppositely disposed blocks on the frame so arranged to have the edge of the wheel interposed therebetween;

:a'plurality of supporting members slidably carried in the respective blocks; a concaved roller rotatably'mounted on each of said supeporting members; resilient means carried by ping tracks upon which the work pieces are:

operate to maintainthe work alignment with the wheel, 5.- Grinding apparatus comprising in comeach supporting member, normally holding the said member in such, position that its respective roller extends into the space between I the blocksyaninclined guide member car ried byeach of said blocks; and a conveyor on'the frame, comprising means for moving work pieces into engagement with the in-' clined guides and concaved rollers which copiece inproper binationla frame, a grinding wheel non-ad- 'justablysupported on the frame, a conveyor including means for moving work pieces into engagement with thegrinding' wheel, and a guide .way adjacent the wheel to hold the I workpieces in properalignment therewith, I

said guide way comprisingspaced blocks hav- 7 slid toward the wheel and spring loaded membination a frame, a, grinding wheel non-ad justably supported on the frame, a conveyor 1 "including means for moving work pieces into maintain them in hers adapted to engage the work pieces and the tracks. I a g 6'. Grindingapparatus comprising in comengagement with the grinding wheel, and a proper engagement with block and providing a track along which the conveyor is adapted to move the work piece into engagement with the grinding wheel, each block having also a spring loaded member adapted to engage the work piece and 'niaintain it upon the inclined surfaces of the blocks. 7

7. Grinding apparatus comprising in combination, a frame, a grinding wheel non-adj ustably supported on the frame, a conveyor including means for movin work pieces into engagement with the grin ing wheel, and a guide way adjacent the wheel to hold the work pieces in proper alignment therewith, said guide way comprising spaced, stationaryblocks each one of which provides an inclined surface sloping downwardly toward the opposite block and providing a track for the work pieces, each block having also a concave roller resiliently supported thereon, the rollers being so formed that they will engage the work pieces and press them-downwardly upon the track.

8. Grinding apparatus comprising in combination a frame, a grinding wheel non-adjustably supported on the frame, a conveyor including means for moving work pieces into engagement with the grinding wheel, and a guide-way adjacent the wheel to hold the work pieces in proper alignment therewith,

said guide-way comprising spaced, stationary blocks each one of which provides an inclined surface sloping downwardly toward the opposite block and providing a track for the work pieces, a member slidably supported by each block; a concaved roller rotatably carried by each member, said rollers being nature. I

RODGER J. EMMERT.

guide way adjacent the wheel to hold the V Work pieces in proper alignment therewith,

saidguide way comprisin spaced, stationary blocks each one of which as an inclined sur face sloping downwardly toward the opposite 

